A sea fan is a type of soft coral found in warm, shallow waters, particularly in the Caribbean Sea and Pacific Ocean. These corals have a flat, fan-like structure that can grow up to several feet wide. Sea fans are composed of tiny polyps that live in colonies, and they rely on water currents to bring them food, such as plankton. Sea fans come in various colors, including yellow, pink, and purple, making them visually striking. They play an essential role in marine ecosystems by providing habitat and shelter for small fish and other marine organisms. Additionally, sea fans contribute to the overall health of coral reefs.